Assighob to



J. METHOD OF MAKWG UNI'TS FOR"RADlATOR.C-0 R' ES.

. FEDDERS.

APPLICATION FILED M1624. 1.9!].

Pfltented Non I. FKDDER S. METHOD OF MAKING UMTSFOR RADIATOR C ORE S. APPLICATION FILED w'eiq, 1917. "1,322,553, Patented Nov. 25, 1919.

3 SHEETS--SHEET 2.

snares rrrrnn'r oration {GEE 3 L. FEDDERS, 9F BUFFALO, NEW YORK, ASSIGNOR T0 FEDDERS MANUFACTURINQ- CQEXZMQHY, Illfi, Q BUFFALO, NEW ZOE-K, A-CORPOBATION QB YER- K.

Specification of Letters Patent.

original application filed April 24, 1918, Serial No. 93,118. Divided and this application filed August 4,

' 1917. Serial Ito. 18%,45.

.l '0 oil whom; it may concern:

Be it known that 1, JOHN M. Fnoonns, a citizen of the United States, residing at Buffalo, in the county of Erie and State of N ew York, have invented new and useful Improvements in Methods of Making Un1ts for RadiatonCores, of which the followinn' is a specification.

ihis invention relates to a method. of making units for the cores' of radiators which are more particularly employed for cooling the water of explosion motors in Inotor vehicles. v L

it the purpose of this invention to 1mprcve the construction of the. individual units of "the core so as to hold the several inemhersthereof more securely in position relatively to each other while assembling the core and also while the same is completed and to accomplish this in a manner which will expedite the manufacture of the radiator and reduce the cost of production and without sacrificing the efiiciency of the radiator. I

This application 18 a (l-lVlSlOll or an application filed by myself April 24:, 1916, Serial #593,118.

In the accompanying drawings;

Figure 1 is a fragmentary front elevation, part y in section, of a radiator core having units constructed iii-accordance with my invention,' the section being taken on line 1-4; lg. 2. Fig. 2 is a horizontal section taken on line 2-2, Fig. 1. Fig. 3-8 are fragmentary longitudinal sections showing dili' rent steps or stages in the method of making up a radiator unit embodying my improvements. Fig. 9 is a fragmentary vertical section similar to Fig. l. but showing a slightly modified iorm of my improvements. Fig. 10 is a horizontal section taken on line 10-10, Fig. 9.

Similar characters of reference indicate corresponding parts throughout the views. y y

A radiator constructed in accordance with my invention comprises a plurality of Water several tubes 1 which are preferably of zig-zag or serpentine form and a plurality of airtubes 2 which are arranged at right angles to the water tubes. The water tubes in the'par-f ticular example shown in the drawings are arranged in a vertical position and the air other disposition of these conduits may be made, if desired. In the completed radiator the upper and lower ends-off the watertubes are connected with. the upper and lower waterheaders or boxes of a radiator in any suit-able and well known manner so that the water from the explosion engine which is to be cooled traverses the water tubes and PatentedNov. as, rar

vtubes are arranged horizontally but .any

is cooled by thepassage of air-through the air tubes between the several water tubes.

The several Water tubes and'air tubes are preferably constructed of a plurality of transversely corrugated or crimped strips of metal which are so assembled that one or more vertical rows or tiers of air tubes are formed bet-Ween each air of adjacent water tubes. In the examp e shownin the drawings two of such corrugated strips3, 3 are employed to. form the walls of each water tube, and one or more'additional corrugated strips-tare used to form one or more radiat-- ing webs, fins 0r disksbetween the opposing Walls of two Water tubes to produce themwith one or more tiers of air tubes between ad acent water tubes. i he summit 5 of the corrugations on one side of each water tube wall extend uniformly or continuously from one longitu- I dinal edge thereof to its "opposite. longitudinal edge while the summits of the corrugations on the opposite side of each of these walls have a receding central part 6 and laterally ofi'-set end portions 8, 8 at the opposite longitudinal edges of this wall. The

strips con tituting the walls of each water. tube are ambled sothat the convex sides of the end mits 01. one of these walls engage with the concave sides of the offset portions ofthe portions of the continuous sum summits of the other companion wall of a water tube, thereby causing the longitudinal edges ofthese two Walls to engage with each other throughout their length while the intcrmediate parts of these walls are separated;

and form a conduit for the assage ofithe water through the same,,as s own in Figs. 1and2. r w .Each-nl'adi'ating webis preferably. so

'formed that the cdnvex sides of the summits 9 of its corrugations are continuous be tween its longitudinal edges. When only one radiating web'is arranged between the opposing Walls of two water tubes, as shown in Figs. 1-8, the conveu sides of the sum mits oat this radiating web engage alteinately' with the convex sides of the summits of the adjacent walls of two water tubes and form with the latter two vertical rows or tiers of air tubes in connection with these walls, as shown in Figs gl, 3-8.

In order to facilitate the manufacture of "this core and hold the parts reliably in place 5 relatively to each other the two walis of adjacent water tubes are constructed. from continuous strip of metal which is so donned that a wholly integral head is formed between two of he corresponding c ls of these walls which is integral with ."mtn these walls, and a partly integral or sectional head is formed between the op-osite ends of these walls. This last mentioned head is composed of two sections 11, 13 which are interlocked with each other and one of which is formed integrally With one end of one of these walls while the other section is formed integrallywith the corresponding of the other wall. The mdi'ating web or webs which are arranged betw en the two walls of adj-acentwater tubes are also preferably interlocked at their op- 'posite ends with the two heads .ooimecting the corresponding ends of these walls so as to form anompletc and substantial unit the members of which. are reliably connected and not liable to become displaced during the manufacture of the radiator or while the same is in use and which can bereadily and quickly assembled with similar units for producing the liadiator core preparatory to assembling the latter with the headers prev ously referred to.

Vv hen a radiator unit of this character is constructed having but a single radiating web or fin between two water tube walls, as

shown in Figs. 1-8, the method of assemblmg the same and the structure resulting from this method is as follows:

A previously formed or corrugated strip of metal having a total length greater than the combined length of the water tube walls "and the connecting heads is first laid out and a previously formed or corrugated la diating web is deposited upon'one-h-alf of the continuous'walland head strip at one endthereof, this webhaying a length somewhat greater tlian the tobaLlength of the completed unit. That portion or half of v the wall strip which is not covered by the (radiating web just referred to is now doubled with reference to the covered part of this strip so as to form the two walls of the unit and arranged parallel or side by side and inclose the radiating strip or web between the same, as shown in Fig. 3. The continuous turn or bight between the two walls of this unit is now bent or folded re versely into approximately thrshapeof the letter 3 so to form a head. 10 of this shape which is integrally connected at its opposite ends witlrthe adjacent end; 01 both of the walls of the unit and has a transverse channel '15 which opens outwardly toward the exterior of the unit and anollu-r Hansverse'channel 16 which opens inwardly'to the internal space between the two walls of this unit, this being; rlnv to tlw onnection of one extremity uf tho S-shaped head with oneof these walls while the other exso treinil y thereof is couiicctcd with the other wall, as shown in F 1g. 4. At. the same time that the doubled or reversely l' l lwl bead l0 l8 fOI'IIKHl whi h i.- imv gral with both walls of the unit the corresponding end 17 or the radiating web between the same is also preferably folded or doubled upon itself into substantially ll-shaped form so that the outer leg or part of this-U-shaped end of the web is arran ed in the inwardly v opening channel 16 of t e integral head, as shown in Fig. 4, thereby securely interlocking this end of the radiating web with the respective head of the unit.

The opposite end portion of the upper wall and the corresponding end portion of the radiating strip are now lifted and the corresponding end of the ldwer wall is bent inwardly and over the companion wall for a short art of its length, as shown in Fig. 5, and tien this end part is bent, doubled, or folded reversely upon itself so as to form the section 11 of the head for thi end of the unit which section has substantially the shape of the letter S, as shown in Fig. 6, and forms an outwardly opening channel 19 and an inwardly opening channel 20. The

other end portion 21 of the web and the other end portion 13 of the other wall of the unit are now lowered upon the headsection 11 which'has just been formed, as shown inFig. 6, and then the respective ends 13, 21 of the upper wall and the radiating web are folded or bent so that the free end 13 of the upper wall assumes the shape of the letter U and the adjacent end 21 of the radiating web assumes the form of a flange. The U-shaped end 13 of the upper unit wall forms the other section of the sectional head and-is inserted in the outwardly 129 opening channel 19 of the companion head section 11, and the flange 21 on the corrcspending end' of the web is arranged be tween the U-shaped head section 13 and the inner ihemlder of the companion s-shaped section 11, as shown in Fig. 7. These two head section and the interposed flange 21 on the corres' onding end of the web are now pressed tight y against each other so that the same become firmly interlocked, shown in we Fig. 8, thereby completing the radiating unit; After a plurahty of such units have been assembled in the manner shown'in Fig.

1 the opposite edges of the same are dippedin solder for the purpose of sealing the joints between the walls of adjacent, units so that they will not leak and also securing the webs to these walls and scaling the heads at opposite ends of the units so that water can leak from the headers into the endmost air tubes in a manner which is customary in the manufacture of this class of goods.

the summits of the corrugations of the other or companion radiating web. In this construction the, two walls of a unit and the heads at opposite ends thereof are also constructed from a continuous strip of metal which is folded upon itself so as to form the two parallel walls of the unit, a wholly integral head 25 at one end thereof which is integral with both walls, and a partly integral or sectional head at the opposite ends thereoi which iscomposedof two sections 26, 27 one of which is integral with one of the walls and the other section being integral with the other Wall of the unit. The, wholly integral head in this case is also bent into substantially S-shaped form so as to produce -l3y thus with the opposite ends of the walls of the an inwardly opening transverse channel 28 and an outwardly opening transverse chan nel 2), said inwardly opening channel receiving flanges 30, 3l-which are formed on the corresponding ends of the two radiating webs betweenthe respective walls of the unit.

The sectional head at the opposite ends of the walls of the units shown in Figs. Qand 10 are so constructed that the section 26 is of S-shaped form and provided with an outwardly opening channel 32 and the other 27 is made of a U-shaped form and arranged in the'channel 32, and the adjacent ends of the two radiating webs are provided with flanges 33, 3% which are arranged between the inner part of the S'shaped head section 2 6 and the U-shcped head section 27 at the respective ends of the walls. When a plurality of units havingtwo radiating strips are arranged in a core the integral head of one unit 1S comparatively narrow and arranged at the top,

of the core and its sectional head comparativelv wide and arranged at the bottom of the cbre and the adjacent unit has its upper integralhead made comparatively wide and iis'lowcr' sectional head made comparatively narrow, as shown in Fig. 9.

interlocking the radiatii'ig webs unit between which the same are disposed displacement of: these parts during the up erdtionmf manufacturing the radiator is avoidedythereby facilitating its inanuiacture and reducin the cost accordingly, and

inthe completed condition of the radiator the sonic is also materially strengtll'e ied so 'thatit'is able to withstand the SllQQkS jiHEl strains to which the same is subjected while in use.

1 claim my invention: I 1; The hereindescribed method of makifi a radiator unit having two outer walls and an intermediate we for forming said walls which is of a length greater than twice the length/of the c0mpletedf'unit and placing upon one half of said strip, whilethe latter is-still straight,

a web strip designed to fo m a web, l3l111"' folding the other half of said wall strip, not previously engaged with said web strip, over the top of the latter so as to form two outer walls cl. the unit, then interlocking said strips at the integrallyconnected ends of said walls, and then interlocking said strip at the free ends of said walls.

' 2. The hereindescribed method of making radiator units which comprises taking a wall strip which is intended to form the outer I walls of the unit and laying the same out straight, said strip having a length greater than twice that of the completed radiator unit, 'placinga web strip of greater length than the length of the completed, unit on said wall strip so that this web strip covers approximately one-half of said wjall strip adjacent to one end of the latter, folding the a the wcbby crimping the same together, and then interlocking the opposite disconnected ends'of said walls with the corresponding end of the web by crimping the respective I-' ends together.

l 3. The hereindescribcd method of snaking a radiator unit which comprises taking a previously corrugated wall strip having a length equal. to more than twice that of lhe completed unit and "layingthe same out flat,

placing a previously corrugated web strip of a length greater than thocompleted unit on one-half of said wall strip ad3accnt to'one end of the latter, doubling that part or the wallstrip which. is uncovered by the web strip overthe latter so that the wall strip forms two outer Walls which are integrally connected all one or their ends by a headand the oppfosite ends of the same are free 1' arranged between said walls which comprises taking. a wall strip &

and the Web strip between the same forms a web, then Crimping the integral head and the adjacent end of the web so as to convert said head into S-shaped form and said web end into the form of a tongue which interlocks with a channel of said S-shaped head,

then bending the opposite free end of one 

